Common name: Pacific Half-and-half Chromis

General information

The Black Axil Chromis, Chromis iomelas, is a small and peaceful reef fish known for its striking blue-green coloration and distinctive black spot on the upper base of the pectoral fin. This species is a member of the Pomacentridae family, which includes damselfish and clownfish. They are a schooling species in the wild and can add a dynamic element to a home aquarium with their active swimming behavior.

Care

Black Axil Chromis are relatively hardy and can be a good choice for both novice and experienced aquarists. They thrive in well-established aquariums with stable water conditions and plenty of swimming space. A tank with live rock formations will provide them with hiding places and territories. They are omnivorous and will accept a variety of foods including flakes, pellets, and frozen or live meaty foods.

Reproduction

In the wild, Black Axil Chromis are known to spawn in groups, with females releasing eggs into the water column to be fertilized by males. In the aquarium, breeding is less common but can occur if the environment is stable and there are multiple individuals to form a breeding group.

Habitat

Black Axil Chromis are found in the Indo-Pacific region, from the Red Sea and East Africa to the central Pacific. They prefer clear lagoons and outer reef slopes, typically at depths ranging from 2 to 15 meters. They are often observed in large schools above stony corals and are known to retreat into branching corals when threatened.